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GFP expression was driven by agr RNAII (A), agr RNAIII (B), and hla (C) promoters in the wild type (Wt) and in an isogenic sarU strain of S. aureus. Bar diagrams represent various time points of the growth phase after inoculation. Samples obtained at 6 h of growth represent early postexponential phase, a time point at which RNAII, RNAIII and hla promoter activities can easily be detected.
